2428129421 has 2 divisors, whose sum is σ = 2428129422. Its totient is φ = 2428129420.

The previous prime is 2428129411. The next prime is 2428129427. The reversal of 2428129421 is 1249218242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1918002025 + 510127396 = 43795^2 + 22586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2428129421 - 2³⁰ = 1354387597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2428129427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1214064710 + 1214064711.

It is an arithmetic number, because the mean of its divisors is an integer number (1214064711).

Almost surely, 2^2428129421 is an apocalyptic number.

It is an amenable number.

2428129421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2428129421 is an equidigital number, since it uses as much as digits as its factorization.

2428129421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 35.

The square root of 2428129421 is about 49276.0532206061. The cubic root of 2428129421 is about 1344.0763633284.

The spelling of 2428129421 in words is "two billion, four hundred twenty-eight million, one hundred twenty-nine thousand, four hundred twenty-one".